Lock for nuts and bolts and the like.



I 'PATBMED DEO.5,1905; 1). MARSHALL. LOOK FOR NUTS AND BOLTS AND THELIKE.

APPLICATION FILED HAIL28, 1905.

2 SEEETS-SHEET 1.

wim'sszs v PATENTED DEC. 5, 1905. D. MARSHALL. LOOK FOR NUTS AND BOLTSAND THE LIKE.

APPLICATION FILED IAR. 28, 1905.

2 SHEBTS-SHEBT 8.

mvmron fl le ilrsazl lay a g V ATTORNEYS yW/TNESSES UN TED STATES PATENToption.-

' DALE MARSHALL, on O ELTENHAM,ENGLAND.

' LOCK F03 NUTS ANDBoL'rs AND THE LIKE.

Specification of Letters Patent.

Patented Dec. 5, 1905.

Application filed la rch 2 8, 1906. Serial No. 252, 451.

To all whom it'may concern:

Be' it known that I, DALE MARsHALL, a subject of the King of GreatBritain, residing-at Oheltenham, in the county of Gloucester, England,have invented certain new and useful Improvements in. -Locks forNuts-and Bolts and the Like, of which the following is a specification,such as will enable those skilled in .the art to which it appertains tomakeand use the same. a

This invention relates to looks for nuts, bolts, studs, pipe-couplings,and the like; and the object thereof is to provide improved devices ofthis class whereby the desired result is secured by means of aconstruction which is simple in operation and comparatively inexpensiveand which. may be applied to any of the various forms of devicesspecified or to others of thesame class.

The invention is fully disclosed in thefollowing specification, of whichthe accompanying drawings form a part, in which the separate parts of myimprovement are designated by 'suitable reference characters in each ofthe views, and in which Figure 1 is a sectional side view showing myimprovement applied in .the operation of coupling two pipes, thecoupling being only partially completed; Fig. 2, aview similarto Fig. 1,but showing the'coupling completed; Fig. 3, a sectional View showing amodification in which my improvement is applied to the locking of a nutor stud on a bolt or similar device, the parts being only partiallyconnected; Fig. 4, a view similar to Fig. 3, but showing the parts fullyconnected and the nut or stud locked to thebolt; Fig. 5, a View similarto Fig. 6, but showing another modification, Fig. 5 being also a sectionon the line of Fig. 7 Fig. 6, a section on the line 6 6 of Fig. 7, andFig. 7 a section on the line 7 7 of Fig. 5.

In Figs. 1 and 2 of the accompanyingdrawings 1 have shown my improvementapplied for the purpose of coupling the ends of p pes,

.and for this purpose I provide a tubular coupling a, threadedinteriorly, as shown at a, and the ends of the pipes b to be coupled arecorrespondingly threaded, as shown at 6 I also employ in each end of thecouplinga in-' termediate sleeves or linings c, which fit between saidcoupling and the ends of the pipes 12, and the sleeves 0 are threadedexternally and internally to correspond with the threads in the couplinga and on the pipes b, and said sleeves or linings are also provided attheir outer ends in, the form ofconstruction shown the, ends of thepipes to becoupled in the.

coupling a is an expander d, which'is tubular 1n form and'the endportions of which are beveled to enablethem to enter the corre-.

sp'onding'ends of the pipes b or to permit said ends of said pipes to beforced onto and expanded thereover.

The sleeves or linings c510 not extend to the middle or central portionof the coupling a, and the effect of the said sleeves or linings c istoform a central enlarged chamber a in the coupling a, the said sleeves orlinings serving, in effect, to decrease the diameter of the bore throughsaid coupling, and in'the operation of screwing the ends of the pipesinto the coupling the said ends of the pipes are expanded, as shown inFig. 2, and enter the central portion a of the bore of the coupling, andwhen the pipes ,have' thus been coupled and the ends thereof expandedthey cannot.

be disconnected from the coupling and-will besec'urely locked withinsaid coupling, as

will be readily understood.

In Figs. 3 and 4: I have shown my improved.

construction employed in looking a stud or nut to a bolt or similardevice, and in this form'of construction a nut, stud, block, or.

similar device it is employed and provided with a screw-threaded socketb and the bolt or other device 11 is threaded at the end to correspondwith the thread in the nut, stud, or block It, and between the threadedend of the bolt or similar device and the nut, stud, or

block It is placed one of the sleeves or linings c, which is shorterthan the socket k and by reason of which the inner end of said socketeffect of the sleeve or lining a being to decrease the diameterof thescrew-threaded is practically enlarged as shown at If, the

socket in the nut, stud, or block it. The inner end of the bolt orsimilar device is also provided with a transverse recess 2' and anexpander j is also employed, said expander in the. form of constructionshownbeing semispherical or provided with a tapered or rounded surface,and in the operation of screwing the stud, nut, or block onto the boltor of too screwing said bolt into the stud, nut, or block i the sideportions or projections i of the bolt or similar device formed by thetransverse recess i are expanded into the enlarged or Inner end portionk of the socket k of the nut, and thisoperates to securely lock the boltIIO . and causing the sleeve or lining a to adhere to said nut, stud, orblock, and the same result may be accomplished by turning the bolt cin'the reversed direction while causing the sleeve or lining c to adhereto the nut, stud, or block; but with this construction the nut, stud, orblock will not work off or become accidentally detached.

In Figs. 5 to 7 I have shown a slight modification of the constructionshown in-Figs. 3 and 4, and in this modification the sleeve or lining 0is slitted or slotted longitudinally, as shown at 0 to permit of theexpansion or contraction of said sleeve or lining, and this slotting orslitting of said sleeve or lining is employed in the form ofconstruction at both sides of the sleeve or lining, or it may beemployed at any desired point therein, and with this exception theconstruction shown in Figs. 5 to 7, inclusive, is substantially the sameas that shown in Figs. 3 and 4.

From the foregoing description it will be apparent that my improvementinvolvesa female member provided with a screw-threaded socket or boreand a male member threaded to correspond therewith and adapted to bescrewed thereinto and a sleeve or lining placed between said members andthreaded to correspond with each, the sleeve or lining being shorterthan the threaded portion of either 0 said members, and means forexpanding the inner end of the male member, and within these limitationsvarious changes in and modifications of the construction hereindescribed may be made without departing from the spiritof my inventionor sacrificing its advantages, and the threading of the several parts asherein described is not absolutely essential, as the thread in thefemale member and the thread on the male member and the threading of thesleeve or lining may all be omitted, and said sleeve or lining may betubular in form and may be secured in the female member in any desiredmanner, and with this form of construction the operation and resultswould be the sameas hereinbefore described.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a device of the class described, a female member provided with athreaded bore or socket, a male member provided with a threaded end, asleeve or lining placed between the threaded portions of said membersand shorter than the threaded portion of either of said members, andmeans for expanding the inner end of the male member, substantially asshown and described.

2. In a device of the class described, a female member provided with athreaded bore or socket, a male member provided with a threaded end, asleeve or lining placed between the portion of either of said members,and means for expanding the inner end of the male member, consisting ofan expander placed in the female member and projecting side portions atthe end of the male member, substantially as shown and described.

In testimony that I claim the foregoing as my invention 1 have signed myname, in presence of the subscribing witnesses, this 2d day of March,1905.

DALE MARSHALL.

Witnesses:

WILLIAM HOLLOWAY ADAMS, WALTER COOPER HARRISON.

